package com.admin.web.controller.common;

import com.admin.common.config.Global;
import com.admin.common.config.ServerConfig;
import com.admin.common.constant.Constants;
import com.admin.common.core.domain.AjaxResult;
import com.admin.common.utils.StringUtils;
import com.admin.common.utils.file.FileUploadUtils;
import com.admin.common.utils.file.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 通用请求处理
 *
 * @author fangchen
 */
@Controller
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger( CommonController.class );

    @Autowired
    private ServerConfig serverConfig;

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("common/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.isValidFilename( fileName )) {
                throw new Exception( StringUtils.format( "文件名称({})非法，不允许下载。 ", fileName ) );
            }
            String realFileName = System.currentTimeMillis() + fileName.substring( fileName.indexOf( "_" ) + 1 );
            String filePath = Global.getDownloadPath() + fileName;

            response.setCharacterEncoding( "utf-8" );
            response.setContentType( "multipart/form-data" );
            response.setHeader( "Content-Disposition",
                    "attachment;fileName=" + FileUtils.setFileDownloadHeader( request, realFileName ) );
            FileUtils.writeBytes( filePath, response.getOutputStream() );
            if (delete) {
                FileUtils.deleteFile( filePath );
            }
        } catch (Exception e) {
            log.error( "下载文件失败", e );
        }
    }

    /**
     * 通用上传请求
     */
    @PostMapping("/common/upload")
    @ResponseBody
    public AjaxResult uploadFile(MultipartFile file) throws Exception {
        try {
            // 上传文件路径
            String filePath = Global.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload( filePath, file );
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put( "fileName", fileName );
            ajax.put( "url", url );
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error( e.getMessage() );
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/common/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        // 本地资源路径
        String localPath = Global.getProfile();
        // 数据库资源地址
        String downloadPath = localPath + StringUtils.substringAfter( resource, Constants.RESOURCE_PREFIX );
        // 下载名称
        String downloadName = StringUtils.substringAfterLast( downloadPath, "/" );
        response.setCharacterEncoding( "utf-8" );
        response.setContentType( "multipart/form-data" );
        response.setHeader( "Content-Disposition",
                "attachment;fileName=" + FileUtils.setFileDownloadHeader( request, downloadName ) );
        FileUtils.writeBytes( downloadPath, response.getOutputStream() );
    }
}
